Re: NMI appears to be stuck (0->0)

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From: Alexander Beregalov <a.beregalov@xxxxxxxxx>
Date: Wed, 4 Feb 2009 17:36:12 +0300

> Is it known problem?
> It is Ultra10.
> 
> Testing NMI watchdog ...
> WARNING: CPU#0: NMI appears to be stuck (0->0)!

It's expected.  The NMI watchdog can't work on pre-UltraSPARC-III
chips because they lack a profiling counter overflow interrupt.

I'll add some checks so it doesn't even try to do the NMI watchdog
test on these cpus.
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